checkCnameLoop() — netty Function Reference

Architecture documentation for the checkCnameLoop() function in DnsResolveContext.java from the netty codebase.

Function java NativeResolver JavaResolver called by 1

Entity Profile

NativeResolver→ JavaResolver→ checkCnameLoop() — netty Function Reference

Dependency Diagram

graph TD
  dfbda749_b4f2_5fff_13bc_40221c8ce9d3["checkCnameLoop()"]
  3bc002ec_f54e_a55f_0b37_77eac88c60db["DnsResolveContext"]
  dfbda749_b4f2_5fff_13bc_40221c8ce9d3 -->|defined in| 3bc002ec_f54e_a55f_0b37_77eac88c60db
  653aff1a_f300_0afb_040a_76c90c54f4dc["String()"]
  653aff1a_f300_0afb_040a_76c90c54f4dc -->|calls| dfbda749_b4f2_5fff_13bc_40221c8ce9d3
  style dfbda749_b4f2_5fff_13bc_40221c8ce9d3 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

resolver-dns/src/main/java/io/netty/resolver/dns/DnsResolveContext.java lines 359–364

    private static void checkCnameLoop(String hostname, String first, String second) throws UnknownHostException {
        if (first.equals(second)) {
            // Follow CNAME from cache would loop. Lets throw and so fail the resolution.
            throw new UnknownHostException("CNAME loop detected for '" + hostname + '\'');
        }
    }